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FieldFox Is Now a Pulse Generator

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The Industry's Most Integrated Handheld RF Analyzer

Keysight's FieldFox portable analyzers are equipped to handle your toughest working environments during routine maintenance, in-depth troubleshooting, and anything in between. Choose the software-enabled Keysight FieldFox configuration that best meets your needs.
  • Configure FieldFox as a cable and antenna analyzer (CAT), handheld vector network analyzer (VNA), handheld spectrum analyzer, pulse generator, or all-in-one combination RF analyzer.
  • Get frequency coverage up to 54 GHz with precision comparable to benchtop results.
  • Make 5G field test a reality with wide analysis bandwidth up to 120 MHz.
  • Capture small, interfering signals with wideband, real-time analysis.
Get to Know the FieldFox Handheld RF Analyzer
  • FieldFox Handheld RF Analyzer with RTSA

  • FieldFox Handheld Antenna Analyzer measuring s-parameters

  • FieldFox RF Analyzer with RTSA

  • FieldFox Handheld Antenna Analyzer back view

Learn More About Each Software Option

Download Technical Overview

FieldFox RF Analyzer Software

Offering 25+ license-key activated software applications.

RTSA Interference hunting on FieldFox Handheld RF Analyzer

5G / LTE Field Testing

  • EMF measurements
  • Over-the-air (OTA) testing
  • Channel scanner
  • Wideband analysis
Interference RF Analyzer and Spectogram software screenshot

Spectrum Analysis

  • Real-time spectrum analyzer (RTSA)
  • Analog demodulation
  • Interference hunting
  • IQ analyzer
antenna analyzer 2 port s parameters software screenshot

Cable and Antenna Testing (CAT)

  • Vector network analysis (VNA)
  • 2 port s-parameters
  • TDR cable measurements
Pulse Measurement with USB Peak Power Sensor software

Power Measurements

  • USB power sensor measurements
  • Built-in power meter
  • Pulse measurements
  • Peak power sensor
RF Analyzer Indoor and Outdoor Mapping for data collection

Utilities

  • Remote control
  • GPS receiver
  • Indoor/outdoor mapping
  • Pulse generator
Explore All FieldFox Software

Never Sacrifice Capability or Portability

Lightweight, rugged, and portable, FieldFox is ready to meet your RF test needs. Stay ahead of changing measurement requirements by upgrading your handheld RF analyzer in the field with 25+ convenient, user-installable license keys.

What's New With FieldFox Handheld RF Analyzers?

Easily capture signals with FieldFox handheld spectrum analyzers

Interference Hunting

Identify and locate the source of unwanted emitters and interfering signals with real-time spectrum analysis.

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Control you spectrum by pairing Keysight Spectrum Management Software with FieldFox handheld RF analyzers

Keysight Spectrum Monitoring Software (KSMS)

Control your spectrum, measure utilization, and identify interference, all in a single platform.

Explore KSMS
Hunt down elusive signals with FieldFox handheld RF analyzers

Fox Hunt

Join this 9-part video series on hunting down elusive signals in the field with the FieldFox handheld RF analyzer.

Watch Video Series
Woman in keysight lab with FieldFox handheld RF analyzer and EMF antenna

5G Field Testing Course

Explore path loss, electromagnetic field (EMF) measurements, and 5G NR over-the-air (OTA) demodulation with RTSA.

View Video Course
FieldFox handheld RF analyzer with built-in pulse generator

Pulse Generator | Option 357

FieldFox capabilities now extend to signal generation with our new built-in pulse signal generator up to 54 GHz.

Create various pulses, such as standard pulses, FM chirps, FM triangles, AM pulses, and user-defined pulse sequences. Generate continuous-wave (CW) signals including AM/FM modulations, FSK, and BPSK.

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Time Difference of Arrival (TDOA) solution using three FieldFox RF analyzers and KSMS software

Time Difference of Arrival (TDOA) with KSMS

TDOA is an emerging directional finding technique providing accurate results with as little as ten meters of uncertainty.

Using this direction-finding method, several FieldFox RF analyzers in separate geographical locations with synchronized GPS signals can determine the location of an unknown signal source.

Detect, locate, and mitigate interference issues.

Learn More About TDOA
Antenna analyzer and Interference Hunting Resource for FieldFox handheld RF analyzer

Interference Finder with DF Antenna | Option 366

Perform last-mile detection of an unknown signal source using manual signal triangulation.

Automatically map multiple bearings based on detected peak power vs azimuth. Record measurements into a CSV file for post-processing.

Learn more about our DF antenna
FieldFox RF analyzer C-Models

Software-Defined Analyzer | N9912C

With fully upgradable and license-key activated frequency, bandwidth, and over 20 software applications, easily customize your analysis to your requirements.

Mix and match VNA and SA frequencies, and effortlessly upgrade the capabilities of your analyzer as your needs change.

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Real-Time Spectrum Analysis At Your Fingertips

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  • Self-serve? Yes
  • Experience duration: 3 mins
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  • Self-serve? No
  • Experience duration: 30 mins

Request a Free Trial

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  • Self-serve? Yes
  • Experience duration: 30 days
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Use Cases

How to Monitor 5G Field Interference

How to Monitor 5G Field Interference

Identifying in-band and out-of-band interference requires real-time spectrum analysis and signal capture capabilities. Learn how to capture elusive intermittent signals and interference using real-time spectrum analysis (RTSA).

How to Characterize 5G mmWave Air Interface

How to Characterize 5G mmWave Air Interface

Characterizing 5G over-the-air requires an integrated, portable signal analyzer with a phased-array antenna. Learn how to overcome key 5G network deployment challenges by characterizing millimeter-wave path loss and coverage.

How to Measure RF Channel Power in the Field

How to Measure RF Channel Power in the Field

Verifying signal coverage in the field requires collecting, logging, mapping, and processing signal data. Learn how to simultaneously measure the channel power of up to 20 channels and playback over GPS mapping to get a full view of your signal coverage.

How to Perform 5G Private Network Site Survey

How to Perform 5G Private Network Site Survey

Deploying and operating 5G private networks requires site survey testing. Learn how to verify RF transmission chain of the base stations as well as end-to-end quality of service and ability to relay real traffic.

How to Demodulate FM Signals Over-the-Air

How to Demodulate FM Signals Over-the-Air

Analyzing over-the-air FM signals requires extracting audio through analog demodulation. Learn how to collect and analyze information such as carrier power, frequency, modulation rate, and deviation.

Explore Our Most Popular Models

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N9918B Real Time Spectrum Analysis

N9918B FieldFox Handheld RF Analyzer

Max frequency: 26.5 GHz
Max bandwidth: 120 MHz

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N9953B FieldFox Handheld Microwave Analyzer

N9953B FieldFox Handheld RF Analyzer

Max frequency: 54 GHz
Max bandwidth: 120 MHz

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N9912C

N9912C FieldFox Handheld RF Analyzer

Max frequency: 10 GHz
Max bandwidth: 40 MHz

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N9915C FieldFox RF Analyzer

N9915C FieldFox Handheld RF Analyzer

Max frequency: 10 GHz
Max bandwidth:  120 MHz

Get quote

Find the Model That is Right for You

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Already own one of these products? Visit Technical Support
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N9914A
N9914A FieldFox Handheld RF Analyzer, 6.5 GHz 
Starting from  
Vector Network Analyzer: Yes - Optional
Cable and Antenna Analyzer: Yes - Standard
Spectrum Analyzer: Yes - Optional
Minimum Frequency: 30 kHz
Maximum Frequency: 6.5 GHz
SA Start Frequency: 5 kHz
Additional CAT/VNA Based Features:
QuickCal (Subset)
DTF/TDR Cable Measurements
Mixed-Mode S-Parameters
Vector Voltmeter
N9914B
N9914B FieldFox Handheld RF Analyzer, 6.5 GHz 
Starting from  
Vector Network Analyzer: Yes - Optional
Cable and Antenna Analyzer: Yes - Standard
Spectrum Analyzer: Yes - Optional
Minimum Frequency: 30 kHz
Maximum Frequency: 6.5 GHz
SA Start Frequency: 5 kHz
Additional CAT/VNA Based Features:
Mixed-Mode S-Parameters
DTF/TDR Cable Measurements
Vector Voltmeter
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FieldFox Handheld RF Analyzers Featured Resources

Technical Overviews 2024.01.14

Keysight Spectrum Management Software

Keysight Spectrum Management Software

Keysight Spectrum Management Software (KSMS) is a comprehensive software tool kit to modernize how frequency regulators, public and private network operators manage its frequency resource, detect, locate and mitigate interference issues, provide full stack spectrum optimization from RF to over the air analog and digital demodulation.

2024.01.14

Technical Overviews 2024.04.30

FieldFox Handheld Analyzers

FieldFox Handheld Analyzers

Now there’s a rugged, dependable handheld designed to deliver precise, lab-grade measurements up to 50 GHz. Learn more about the FieldFox microwave analyzers.

2024.04.30

Technical Overviews 2021.10.31

FieldFox Handheld Analyzers 4/6.5/9/14/18/26.5/32/44/50 GHz

FieldFox Handheld Analyzers 4/6.5/9/14/18/26.5/32/44/50 GHz

Now there’s a rugged, dependable handheld designed to deliver precise, lab-grade measurements up to 50 GHz. Learn more about the FieldFox microwave analyzers.

2021.10.31

Configuration Guides 2024.04.30

FieldFox Handheld Analyzers 4/6.5/9/14/18/26.5/32/44/50/54 GHz (B and C models)

FieldFox Handheld Analyzers 4/6.5/9/14/18/26.5/32/44/50/54 GHz (B and C models)

This comprehensive handheThe FieldFox handheld analyzer configuration guide provides the potential customers to correctly pick the model and options to best fit their needs in technically and economically. By adding the new information of newly introduced C-Series FieldFox handheld analyzers (Code name Earhart) configuration information, customers can make their best purchase decision on the new C-Series FieldFox and upgrading their existing C-Series FF in later days.

2024.04.30

Data Sheets 2024.01.14

85574A Handheld Direction Finding Antenna

85574A Handheld Direction Finding Antenna

This data summarizes the technical performance of an antenna used with the FieldFox handheld analyzers for the direction finding.

2024.01.14

Data Sheets 2024.04.30

FieldFox Handheld Analyzers

FieldFox Handheld Analyzers

The FieldFox datasheet update includes new C model versions.

2024.04.30

Data Sheets 2024.03.05

FieldFox Handheld Analyzers 4/6.5/9/14/18/26.5/32/44/50 GHz

FieldFox Handheld Analyzers 4/6.5/9/14/18/26.5/32/44/50 GHz

This document is the FieldFox Data Sheet

2024.03.05

Data Sheets 2024.04.30

FieldFox Handheld Analyzers

FieldFox Handheld Analyzers

The FieldFox datasheet update includes new B model versions.

2024.04.30

Solution Briefs 2023.03.21

FieldFox Microwave Analyzers Portable Satellite Test Solution for Field and Lab Applications

FieldFox Microwave Analyzers Portable Satellite Test Solution for Field and Lab Applications

Learn how to install, maintain, and troubleshoot satellite ground stations and end-user terminals that support satellite networks. Our brief describes a portable, accurate RF satellite test solution based on the FieldFox microwave analyzer. It verifies the performance of amplifiers, frequency converters, over-the-air (OTA) signal quality, transmit power, and more.

2023.03.21

eBooks 2023.03.16

Six Essential 5G Field Tests Using FieldFox Handheld Analyzers

Six Essential 5G Field Tests Using FieldFox Handheld Analyzers

This eBook explains the six essential 5G field tests FieldFox handheld analyzers perform. Make your 5G transformation smooth with path loss characterization, base station coverage testing, and more.

2023.03.16

eBooks 2023.03.13

5 Handheld Analyzer Tools for Field Testing

5 Handheld Analyzer Tools for Field Testing

Looking for a multi-purpose handheld analyzer to meet your field testing needs? Check out this eBook to learn about handheld tools for making accurate field tests.

2023.03.13

eBooks 2023.03.12

A Practical Guide to Locate and Mitigate Interference

A Practical Guide to Locate and Mitigate Interference

Signal hunting grows increasingly complex in today’s crowded RF spectrum environment. Here are the most common problems encountered as well as information on detecting, identifying, locating, and mitigating these problem signals.

2023.03.12

White Papers 2022.11.28

Investigate Interference Issues in the Field with RTSA

Investigate Interference Issues in the Field with RTSA

5G Field Testing with FieldFox

2022.11.28

White Papers 2023.03.19

Innovative Use Cases for Handheld Analyzers in the Medical Field

Innovative Use Cases for Handheld Analyzers in the Medical Field

Handheld analyzers provide affordable, portable measurement capabilities. This white paper discusses the use of handheld analyzers in two unique and innovative medical applications: cancer detection and spinal cord stimulation.

2023.03.19

White Papers 2022.10.13

Reduce Interference Risk in Connected Medical Devices

Reduce Interference Risk in Connected Medical Devices

This white paper highlights the importance of coexistence testing in wireless equipment and a step-by-step guide on how it can be done in the lab.

2022.10.13

White Papers 2023.03.20

Smarter Airports: Field Assurance for Airports and Air Traffic Control Systems

Smarter Airports: Field Assurance for Airports and Air Traffic Control Systems

Successful airport operation depends on numerous indispensable modern electronic devices and monitoring networks. With the rollout of 5G, service engineer teams responsible for field testing airport and air traffic control systems have to plan for a new era of smart, civil aviation. This white paper covers several monitoring systems found in the air transport industry and the field tests used to verify their performance.

2023.03.20

White Papers 2022.11.24

Analog Demodulation Measurements

Analog Demodulation Measurements

Explore the “how, what and why’s” of analog demodulation measurements. What it is, why it is useful, and tips for measuring modulated signals.

2022.11.24

White Papers 2023.02.12

Four Channel Power Measurement Must-Haves for Your Field Kit

Four Channel Power Measurement Must-Haves for Your Field Kit

Modern communications systems have complex modulation formats. This white paper covers four channel power measurements you should make in the field to ensure the performance and compliance of these systems.

2023.02.12

White Papers 2022.11.22

Four Measurements You Can Perform on the Go

Four Measurements You Can Perform on the Go

This white paper discusses the importance of commonly made radio frequency field measurements: real-time spectrum analysis (RTSA), noise figure, over-the-air measurements (OTA), and cable and antenna test (CAT).

2022.11.22

Application Notes 2023.02.23

Overcome RF and Microwave Interference Challenges

Overcome RF and Microwave Interference Challenges

Learn tips to overcome RF and microwave interference challenges and troubleshooting interference in the field with Real-Time Spectrum Analysis (RTSA).

2023.02.23

Application Notes 2023.03.20

Getting Better Measurements on the Go with a FieldFox Handheld Analyzer

Getting Better Measurements on the Go with a FieldFox Handheld Analyzer

This application note provides tips to help you make more accurate measurements in the field for cable, antenna, network analysis and spectrum analysis applications.

2023.03.20

Application Notes 2023.03.16

5G Over-the-Air Performance Measurement and Evaluation

5G Over-the-Air Performance Measurement and Evaluation

This application note discusses the challenges RF engineers face when deploying 5G on mmWave and how the FieldFox analyzer meets those challenges.

2023.03.16

Application Notes 2023.03.20

Techniques for Precise Cable and Antenna Measurements in the Field

Techniques for Precise Cable and Antenna Measurements in the Field

2023.03.20

Application Notes 2023.03.19

Techniques for Time Domain Measurements

Techniques for Time Domain Measurements

This application note will introduce time domain and DTF measurement techniques for identifying the location and relative amplitudes of discontinuities while operating in the field.

2023.03.19

Application Notes 2023.12.11

Transmission Lines and Reflected Signals

Transmission Lines and Reflected Signals

FieldFox Fundamentals — Lesson 3. Learn the basics of transmission lines and reflected signals with some practice measurements of the reflection coefficient using a FieldFox handheld analyzer.

2023.12.11

Application Notes 2023.10.19

Site Survey Solution for Private Networks

Site Survey Solution for Private Networks

This application note describes the importance of ensuring reliable network operation when deploying 5G private networks, the most important measurements for wireless network site survey, and the Keysight solutions for performing them.

2023.10.19

Solution Briefs 2023.03.20

FieldFox All-in-One Pre-Compliance EMI Analyzer

FieldFox All-in-One Pre-Compliance EMI Analyzer

Keysight’s FieldFox handheld analyzer provides a comprehensive solution to measure EMI, amplitude probability distribution (APD), FFT spectrum analysis, and real-time spectrum analysis with density and spectrogram displays. It also performs vector network analysis for full, two-port S-parameter measurements. It is an ideal, handheld solution to address all EMI troubleshooting issues in the field.

2023.03.20

Solution Briefs 2022.05.05

Satellite Test Solution for Field and Lab Applications

Satellite Test Solution for Field and Lab Applications

Learn how to install, maintain, and troubleshoot satellite ground stations and end-user terminals that support satellite networks. Our brief describes a portable, accurate RF satellite test solution based on the FieldFox microwave analyzer. It verifies the performance of amplifiers, frequency converters, over-the-air (OTA) signal quality, transmit power, and more.

2022.05.05

Flyers 2024.02.06

FieldFox Microwave Analyzers B-Series vs. A-Series Specifications

FieldFox Microwave Analyzers B-Series vs. A-Series Specifications

This is a one-pager to compare the key specs among different models within the FieldFox family.

2024.02.06

View All Resources

View All Resources

Extend Your Capabilities with the Right Tools

Get more functionality out of your FieldFox Handheld RF Analyzer today by pairing it with the right accessories.

FieldFox Handheld RF Analyzer FAQs

FieldFox is the industry's first 50 GHz handheld RF analyzer. The Swiss army knife of electrical measurement, FieldFox functions as a vector network analyzer (VNA), cable and antenna analyzer (CAT), spectrum analyzer (SA), or an all-in-one combination RF analyzer.

An RF analyzer is a test instrument capable of combining vector network analysis, spectrum analysis, and cable and antenna testing of radio frequency signals. Network analysis characterizes the response of a device or circuit to RF signals, while spectrum analysis measures the frequency, power, and noise of a signal. Analyzers treat the device under test (DUT) as an electrical network to measure how the DUT alters radio frequency signals through interaction.

RF analyzers provide spectrum and network analysis on RF devices and the characterization of parameters such as:

  • RF signal amplitude at different frequencies
  • scattering parameters (S-parameters)
  • impedance of the overall network
  • gain in RF signal power
  • return and insertion losses
  • signal phase shifts

 

FieldFox provides benchtop accuracy in a portable package. Built to withstand your toughest working environments, FieldFox is rugged enough to meet MIL specs and enables 5G, satellite, and radar operators to make true RF coverage measurements up to 54 GHz and beyond. Lightweight, rugged, and portable, FieldFox is ready to meet your RF test needs. For more information on the world’s most integrated handheld analyzer, see our technical overview.

Network analyzers verify the performance of various components such as antennas, amplifiers, cables, and many other active or passive devices. Network analyzers tend to be sensitive equipment, but many network measurements involve devices that live outside the laboratory. Because of this, having a handheld analyzer to carry with you into the field is extremely valuable.

Yes, you can configure FieldFox as a cable and antenna analyzer (CAT), vector network analyzer (VNA), spectrum analyzer (SA), or an all-in-one combination RF analyzer. With the FieldFox, you can make 5G field test measurements with wide analysis bandwidth up to 120 MHz.

The key network analyzer functions of FieldFox are pulse measurements, TDR (Time Domain Reflectometry), cable measurements, QuickCal, and full 2-port S-parameters.

There are six essential field tests for 5G networks. These include (1) path loss characterization; (2) base station coverage testing; (3) component carrier power measurements; (4) over-the-air control channel coverage testing; (5) network quality and beam performance verification; and (6) EMF exposure evaluation. To learn more about using FieldFox to perform 5G field testing, check out our eBook: Essential 5G Field Tests or view this short course: How to test 5G networks in the field.  

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